Captcha means.-" Completely automated public turning test to tell computers and humans apart".
It is a test that is used for knowing if the user is a human or a robot. And they appear when you want to enter to program on which password is requied and it can also appears when you want to download something to the computer
Definition (Class Summary)
Captcha means.-" Completely automated public turning test to tell computers and humans apart".It is a test that is used for knowing if the user is a human or a robot. And they appear when you want to enter to program on which password is requied and it can also appears when you want to download something to the computer
News Articles
http://www.warriorforum.com/adsense-ppc-seo-discussion-forum/503193-article-marketing-robot-captcha-test-error.html
Example: